Communication Method and Apparatus

1. A communication method, comprising: sending, by a network device, first configuration information, wherein the first configuration information is useable to map a first reference signal to a first resource element set in a first time element, and the first resource element set comprises at least a first resource element; and sending, by the network device, second configuration information, wherein the second configuration information is useable to map a second reference signal to a second resource element set in a second time element, and the second resource element set comprises at least a second resource element, wherein a frequency domain resource occupied by the first resource element overlaps a frequency domain resource occupied by the second resource element in response to the first time element and the second time element overlapping each other in a time domain; wherein a subcarrier spacing of the first reference signal is a first subcarrier spacing, and a subcarrier index of the first resource element is a first value, and is in the first subcarrier spacing; and the second resource element fails to be useable to transmit the second reference signal in response to a value of the first value being an integer multiple of 2n; or the second resource element is useable to transmit the second reference signal in response to a value of the first value failing to be an integer multiple of 2n, and n is a positive integer greater than or equal to 1.

2. The method according to claim 1, wherein a first subcarrier spike is aligned with a second subcarrier spike; and the first subcarrier spike is a subcarrier spike corresponding to a resource element whose subcarrier index is an integer multiple of 2n in a first subcarrier spacing, the second subcarrier spike is a subcarrier spike corresponding to one resource element in a second subcarrier spacing, the first subcarrier spacing is a subcarrier spacing of the first reference signal, the second subcarrier spacing is a subcarrier spacing of the second reference signal, and the second subcarrier spacing is 2n times the first subcarrier spacing.

3. The method according to claim 1, wherein a subcarrier spacing of the first reference signal is a first subcarrier spacing, a subcarrier spacing of the second reference signal is a second subcarrier spacing, the second subcarrier spacing is 2n times the first subcarrier spacing, where n is a positive integer greater than or equal to 1, and the first time element in the first subcarrier spacing corresponds to 2n second time elements in the second subcarrier spacing; and the method further comprises: repeatedly sending, by the network device, the second reference signal in the 2n second time elements that correspond to the first time element.

4. The method according to claim 3, wherein the 2n second time elements comprise at least a third time element and a fourth time element, and at least one of the following configurations: the fourth time element includes a cyclic suffix, a frequency domain signal of the third time element is multiplied by a phase rotation factor, or a frequency domain signal of the fourth time element is multiplied by the phase rotation factor.

5. A communication method, comprising: receiving, by a terminal device, first configuration information from a network device, wherein the first configuration information is useable to map a first reference signal to a first resource element set in a first time element, and the first resource element set comprises at least a first resource element; and receiving, by the terminal device, second configuration information from the network device, wherein the second configuration information is useable to map a second reference signal to a second resource element set in a second time element, and the second resource element set comprises at least a second resource element, wherein a frequency domain resource occupied by the first resource element overlaps a frequency domain resource occupied by the second resource element in response to the first time element and the second time element overlapping each other in a time domain; wherein a subcarrier spacing of the first reference signal is a first subcarrier spacing, and a subcarrier index of the first resource element is a first value, and is in the first subcarrier spacing; and the second resource element fails to be useable to transmit the second reference signal in response to a value of the first value being an integer multiple of 2n; or the second resource element is useable to transmit the second reference signal in response to a value of the first value failing to be an integer multiple of 2n, and n is a positive integer greater than or equal to 1.

6. The method according to claim 5, wherein a first subcarrier spike is aligned with a second subcarrier spike; and the first subcarrier spike is a subcarrier spike corresponding to a resource element whose subcarrier index is an integer multiple of 2n in a first subcarrier spacing, the second subcarrier spike is a subcarrier spike corresponding to one resource element in a second subcarrier spacing, the first subcarrier spacing is a subcarrier spacing of the first reference signal, the second subcarrier spacing is a subcarrier spacing of the second reference signal, and the second subcarrier spacing is 2n times the first subcarrier spacing.

7. The method according to claim 5, wherein a subcarrier spacing of the first reference signal is a first subcarrier spacing, a subcarrier spacing of the second reference signal is a second subcarrier spacing, the second subcarrier spacing is 2n times the first subcarrier spacing, where n is a positive integer greater than or equal to 1, and the first time element in the first subcarrier spacing corresponds to 2n second time elements in the second subcarrier spacing; and the method further comprises: repeatedly receiving, by the terminal device, the second reference signal in the 2n second time elements that correspond to the first time element.

8. The method according to claim 7, wherein the n second time elements comprise at least a third time element and a fourth time element, and at least one of the following configurations: the fourth time element includes a cyclic suffix, a frequency domain signal of the third time element is multiplied by a phase rotation factor, or a frequency domain signal of the fourth time element is multiplied by the phase rotation factor.

9. An apparatus, comprising: a communication interface, configured to send first configuration information, wherein the first configuration information is useable to determine a first resource element set useable to map a first reference signal to a first time element, and the first resource element set comprises at least a first resource element; and the communication interface is further configured to send second configuration information, wherein the second configuration information is useable to determine a second resource element set useable to map a second reference signal to a second time element, and the second resource element set comprises at least a second resource element; and a frequency domain resource occupied by the first resource element overlaps a frequency domain resource occupied by the second resource element in response to the first time element and the second time element overlapping each other in a time domain; wherein a subcarrier spacing of the first reference signal is a first subcarrier spacing, and a subcarrier index of the first resource element is a first value, and is in the first subcarrier spacing; and the second resource element fails to be useable to transmit the second reference signal in response to a value of the first value being an integer multiple of 2n; or the second resource element is useable to transmit the second reference signal in response to a value of the first value failing to be an integer multiple of 2n, and n is a positive integer greater than or equal to 1.

10. The apparatus according to claim 9, wherein a first subcarrier spike is aligned with a second subcarrier spike; and the first subcarrier spike is a subcarrier spike corresponding to a resource element whose subcarrier index is an integer multiple of 2n in a first subcarrier spacing, the second subcarrier spike is a subcarrier spike corresponding to one resource element in a second subcarrier spacing, the first subcarrier spacing is a subcarrier spacing of the first reference signal, the second subcarrier spacing is a subcarrier spacing of the second reference signal, and the second subcarrier spacing is 2n times the first subcarrier spacing.

11. The apparatus according to claim 9, wherein a subcarrier spacing of the first reference signal is a first subcarrier spacing, a subcarrier spacing of the second reference signal is a second subcarrier spacing, the second subcarrier spacing is 2n times the first subcarrier spacing, where n is a positive integer greater than or equal to 1, and the first time element in the first subcarrier spacing corresponds to 2n second time elements in the second subcarrier spacing; and the communication interface is further configured to: repeatedly send the second reference signal in the 2n second time elements that correspond to the first time element.

12. The apparatus according to claim 11, wherein the 2n second time elements comprise at least a third time element and a fourth time element, and at least one of the following configurations: the fourth time element includes a cyclic suffix, a frequency domain signal of the third time element is multiplied by a phase rotation factor, or a frequency domain signal of the fourth time element is multiplied by the phase rotation factor.

13. An apparatus, comprising: a communication interface, configured to send first configuration information, wherein the first configuration information is useable to determine a first resource element set useable to map a first reference signal to a first time element, and the first resource element set comprises at least a first resource element; and the communication interface is further configured to receive second configuration information, wherein the second configuration information is useable to determine a second resource element set useable to map a second reference signal to a second time element, and the second resource element set comprises at least a second resource element, wherein a frequency domain resource occupied by the first resource element overlaps a frequency domain resource occupied by the second resource element in response to the first time element and the second time element overlapping each other in a time domain; wherein a subcarrier spacing of the first reference signal is a first subcarrier spacing, and a subcarrier index of the first resource element is a first value, and is in the first subcarrier spacing; and the second resource element fails to be useable to transmit the second reference signal in response to a value of the first value being an integer multiple of 2n; or the second resource element is useable to transmit the second reference signal in response to a value of the first value failing to be an integer multiple of 2n, and n is a positive integer greater than or equal to 1.

14. The apparatus according to claim 13, wherein a first subcarrier spike is aligned with a second subcarrier spike; and the first subcarrier spike is a subcarrier spike corresponding to a resource element whose subcarrier index is an integer multiple of 2n in a first subcarrier spacing, the second subcarrier spike is a subcarrier spike corresponding to one resource element in a second subcarrier spacing, the first subcarrier spacing is a subcarrier spacing of the first reference signal, the second subcarrier spacing is a subcarrier spacing of the second reference signal, and the second subcarrier spacing is 2n times the first subcarrier spacing.

15. The apparatus according to claim 13, wherein a subcarrier spacing of the first reference signal is a first subcarrier spacing, a subcarrier spacing of the second reference signal is a second subcarrier spacing, the second subcarrier spacing is 2n times the first subcarrier spacing, where n is a positive integer greater than or equal to 1, and the first time element in the first subcarrier spacing corresponds to 2n second time elements in the second subcarrier spacing; and the communication interface is further configured to: repeatedly receive the second reference signal in the 2n second time elements that correspond to the first time element.

16. The apparatus according to claim 15, wherein the 2n second time elements comprise at least a third time element and a fourth time element, and at least one of the following configurations: the fourth time element includes a cyclic suffix, a frequency domain signal of the third time element is multiplied by a phase rotation factor, or a frequency domain signal of the fourth time element is multiplied by the phase rotation factor.